Meter for elastic fluids.



T. SCOTT.

METER FORELASTIC FLUIDS.

APPLICATION FILED mus 18. I914.

1,151,406., Patented Aug. 24,1915.

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METER FOR ELASTIC FLUIDS.

APPLICATION FILED JUNE 18. 1914.

1 151,406. Patented Aug. 24, 1915.

2 SHEETS-SHEET 2- .i/wzvmw S0066. 2 y m M 1 WUQJM ATTORNEY c LUMBIA PLANOGRAPH (20., WASHINGTON, D. c.

inviran s'r 'rns rArnNr orrrcn THOMAS soon, or BIRMINGHAM, ENGLAND, ASSIGNOR 'ro PARKINSON AND w; &3.

oow N LIMITED, or BIRMINGHAM, ENGLAND.

METER FOR ELASTIC FLUIDS.

To all whom it may concern:

Be it knownthat I, THOMAS SCOTT, a subject of the King of Great Britain and Ireland, and residing at Bell Barn Road Works, Birmingham, in the county ofVVarwick, England, have invented certain new and useful Improvements in and Relating to Meters for Elastic Fluids, of which the following is a specification.

This invention relates to meters for elastic fluids hereinafter referred to as 1 gas meters or dry meters and has for its main object to provide an improved Construction of such meters. t I

The invention consists in certain features of improvements in a dry meter, as regards the bellows mechanism more particularly pointed out in the claims. I 7 Referring to the accompanying diagram; matic drawings which are not all madeto the same scale :Figures 1 and 2 show in elevation and plan respectively, the assemlily of certain parts according tothe present invention; Figs. 3 andflshow an elevation and plan of a guidingdome; Fig. 5 illustrates the connection of a crank to the worm shaft; Fig. 6 shows a construction of valve stufling box Fig. 7 shows an elevation of a dry meter containing "parts according to the present invention, a plate, having been removed fromthebottom part ofthe meter to show one of the flexible diaphrag'ms with its associated parts. Fig. 8 is a plan of F ig. 7, someof the parts which are shown' i'n Fig. 2 being omitted. Fig. ,9 gives a form of rim against which the diaphragm is held. 7

In carryingthe invention into fefiiect in the form illustrated by way of example, I provide a dry gas meter of any suitable form preferably of the kind having circular diaphragms a, (Fig. 7) and with a common valve seat I) (Fig. 1) for the, valves 0 (Figs.

1 and 2) controlling distribution to'theclia;

The valves shown are phragm chambers. two in number and have guide rods d extending on both sides thereof, so that they can be guided to move with rectilinear motion.

To insure this I provide a dome or cap 6 (Figs. 1, 3 and 4) withtwo sets of oppositely cut slots f. for cooperating with one guide rod of each valve, the other guide rods being guided in suitable slotted standards 9.

The top of the guiding dome c has a depression it formed therein to receive the Specification of Letters Patent. Patented Aug. 24, 1915, Application filed. June 18, 1914. Serial No. 845,890.

lower pivot j of the crank i (Fig. 5) driving the two valves. This crank is set into the spl t end is of the worm shaft Z for communi catingmoti'on to the valves. of the valves can readily be adjusted and then as there is suflicient. friction between the split shaft Z and the crankshaft c the valves and shaft can, be removedjfromthe meter, and the crank soldered tothe worm shaft without fear of altering the setting then or any subsequentremoval.

In connection with the driving gear ofthe meter I also preferthat the thrust of the gear driving the indicating mechanism shall be utilized to assist the 'stufing boxeaction where the spindle passes through themeter casing. To this end I provide the pinion spindle m (Fig. v6) with a ball valve n having a suitable seat 0 and at the endr constructed as a pivot, so that pressureof the gas; and the thrust of the drive normally forces the pivot 7' forward and forcesthe ball valve against its seat whereby good stuffing boxaction'is obtained without undue friction. I r t i Dealing now with thediaphragm chambers in theway illustrated in Figs. 7 and 8 I substitute for the usual fiagsand flag wires a crank arm qpivoted at r and s in the. cas ing t, a ball bearing preferably beingprovided at sf This crank arm 9 isconnected to apart twinconnection with the dia phragm by means of slotted guides a) ear ried on the arm 9 cooperating with pins w moving with the diaphragm.

In orderto be able to oil the insideof the diaphragms without removing them from the meter I clamp two perforated metal disks m at thecenter. One disk is on each side of the diaphragm a so that one alone is shown. The other disk has a projecting screw threaded part g which .canbe closed byascrew metal cap a. This cap may conveniently carry the two pins referred to above; for instance, these can be formed at the end of a casting a movably attached to the cap so that after the cap has been screwed home to form a gas tight joint, the pin carrier can be adjusted without affecting the joint.

The particular advantage gained by the provision of a screw cap on the diaphragm disk is that when the diaphragm becomes stiff owing to long wear and the oil being extracted from the leather bythe nature of Thus the setting I the gas the diaphragm may be re-lubricatedby unscrewing this cap and inserting a brush with lubricant to oilthe diaphragm.

"With meters as ordinarily made this is only possible by cutting a hole in the disk.

There is also the additional advantage that nosolder is required in the process.

For attaching the diaphragm suitably t0 the frame I provide a rim (Fig. 9)'of such ing layer of oiled paper or the'like 100 may be placed over thebead ifdesired.

The ring is of more or less U-shape with extended turned over flanges and the diaphragm a is gripped within the U by means I of a tension w'ire'12.

' It will-be understood that modificationsmay be made in the construction given above. I I 1 The gear work can all be situatedoutside the diaphragm casing, such construction possessing certain advantages.

Meters as described abovemay be used for high or low pressure. 7

Having now described my invention what I claim as newanddesire to secure by LettersfPatent is;. r p

I. An elastic fluid meter having diaphragm chambers including a screw cap, a diaphragm, .a centrally perforated metal plate disposed in the center ofsaid diaphragm, crank members pivoted in the top and bottom of the diaphragm chambers,

, and bellows, with said screw cap connecting said crank memberstosaid bellows.

2. An elastic fluid meter having diaphragm chambers'including a screw cap, a diaphragm, a centrally perforated metal plate disposed in the center of said diaphragm, crank members pivoted in the top and bottom of the diaphragm chambers, bellows, with said screw cap connecting said Copies of this patent may beobtained for crank members to said bellows, a part carried by said screw cap but movable in relation thereto, and means in connection therewith for cooperation with said crank members.

'the diaphragm chambers, for said crank members, a screw cap and bellows, said screw cap forming a connection between said crank members and said bellows.

4:. Anelastic fluid meter including in combination a flexible diaphragm, a metal'plate attached thereto with an upstanding screwed fla'nge and a screw cap adapted to screw on said flange.

5. An elastic fluid meter including distribution valves, operating rods for said valves, a dome-shapedstandard with guideways extending across two diameters at right angles forming guides for said rods, means for operating said rods and a seating in the top of said standard forming a bearing for said means.

6. vAn elastic fluid meter including valves and valve operating 7 means comprising a spindle with a split end, a worm mounted on said spindle and a crank arm forced into said split end.

.7. 'An elastic fluid meter includinga spindle, gear teeth, formed thereon and a spheri cal valve also formed thereon, a casing perforated for the passage of said spindle and containing a seating for the valve, the gear teeth being so disposed that the drive tends to force the valve against the seating.

8. An elastic fluid meter including a flexible diaphragm and a rim on which said diaphragm is mounted, said rim being formed with a roller bead, a wire extending around theqrim and means for tensioning said wire to clamp the diaphragm close to the rim. a I

In testimony whereof, I aiflx myjsignature in presence oftwo witnesses.

. THOMAS SCOTT. Witnesses: r n

J. A. WALTERS, ALBERT J. Wns'r.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G'. 

